In his book "The Information: A History, A Theory, A Flood," James Gleick implies that when most people really read a book, they immerse themselves in a textual world. This means that instead of just browsing the pages for information or skimming through to find keywords and ideas, they fully engage with the content and let themselves be transported into the world created by the author.
By immersing themselves in the textual world, readers can experience the story, understand the characters, and connect with the themes and messages that the book conveys. This deep engagement with the text allows readers to fully appreciate the richness and complexity of the narrative, leading to a more fulfilling and meaningful reading experience.
Therefore, the correct answer to the question would be:
A. They immerse themselves in a textual world.